 A major modification of the original Lifson–Roig model introduces "capping" parameters for the helical termini, in which the N- and C-terminal capping weights may vary independently.The correlation matrix for this modification can be represented as a matrix M, reflecting the statistical weights of the helix state "h" and coil state "c".The Lifson–Roig model may be solved by the transfer-matrix method using the transfer matrix M shown at the right, where "w" is the statistical weight for helix propagation, "v" for initiation, "n" for N-terminal capping, and "c" for C-terminal capping.